<!DOCTYPE html>
<html lang="zh-cn">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>什么都论坛-后台用户管理</title>
  <style>
   body {
      background: #f7f9fb;
      margin: 0;
      padding: 0;
    }

    .container {
      width: 90%;
      max-width: 1100px;
      margin: -50px auto;
      background: #fff;
      border-radius: 10px;
      box-shadow: 0 2px 12px rgba(80, 133, 203, 0.08);
      padding: 30px;
    }

    .container h2 {
      margin-top: 0;
      color: #0327b3;
      text-align: center;
      padding: 0;
      margin: 0 auto 10px;
    }

  </style>
</head>

<body>
  <div class="container">
    <h2>标题</h2>
   
  </div>
  
</body>

</html>